1. A display method performed in a device having a plurality of buttons, the method comprising:
(a) sensing a touch to the device including sensing locations where the touch has occurred; and
(b) displaying a plurality of images on the plurality of buttons, wherein operation (b) comprises:
(b1) analyzing a trajectory of the sensed locations; and
(b2) displaying a plurality of images, which are indicated by image data corresponding to the analyzed trajectory from among predetermined image data, on the plurality of buttons.
2. The method of claim 1, wherein the images are characters.
3. The method of claim 1, wherein operation (b1) comprises determining whether the analyzed trajectory is a first predetermined trajectory or a second predetermined trajectory, and wherein operation (b2) comprises:
(b21) if it is determined that the analyzed trajectory is the first predetermined trajectory, updating a plurality of currently displayed images in correspondence to the plurality of currently displayed images, and
(b22) if it is determined that the analyzed trajectory is the second predetermined trajectory, displaying the currently displayed images.
4. The method of claim 1, wherein operation (b1) comprises determining whether the analyzed trajectory is a first predetermined trajectory or a second predetermined trajectory, and wherein operation (b2) comprises:
(b21) if it is determined that the analyzed trajectory is the first predetermined trajectory, updating a plurality of currently displayed images by changing a category to which the plurality of currently displayed images belong, and
(b22) if it is determined that the analyzed trajectory is the second predetermined trajectory, updating the plurality of currently displayed images by maintaining the category to which the plurality of currently displayed images belong.
5. The method of claim 1, wherein operation (b2) comprises displaying the plurality of images corresponding to the sensed locations forming the analyzed trajectory on the plurality of buttons.
6. The method of claim 1, wherein the plurality of buttons magnify an image selected from among the plurality of displayed images and display the magnified image.
7. A device comprising:
a sensor to sense a touch to the device, wherein the sensor senses locations where the touch has occurred;
a plurality of buttons to display a plurality of images in response to a control signal; and
a controller to generate the control signal for commanding the display of images on the plurality of buttons, wherein the controller comprises:
a trajectory analyzer to analyze a trajectory of the sensed locations; and
a display controller to generate the control signal for commanding the display of images corresponding to the analyzed trajectory.
8. The device of claim 7, wherein the images are characters.
9. The device of claim 7, wherein the sensor comprises a plurality of touch sensors integrated as one unit with the buttons or a frame of the device.
10. The device of claim 7, wherein the plurality of buttons magnify an image selected from among the plurality of displayed images and display the magnified image.
11. At least one computer readable medium storing instructions that control at least one processor to perform a display method in a device having a plurality of buttons, the method comprising:
(a) sensing a touch to the device including sensing locations where the touch has occurred; and
(b) displaying a plurality of images on the plurality of buttons, wherein operation (b) comprises:
(b1) analyzing a trajectory of the sensed locations; and
(b2) displaying a plurality of images, which are indicated by image data corresponding to the analyzed trajectory from among predetermined image data, on the plurality of buttons
12. At least one computer readable medium as recited in claim 11, wherein the images are characters.
13. At least one computer readable medium as recited in claim 11, wherein operation (b1) comprises determining whether the analyzed trajectory is a first predetermined trajectory or a second predetermined trajectory, and wherein operation (b2) comprises:
(b21) if it is determined that the analyzed trajectory is the first predetermined trajectory, updating a plurality of currently displayed images in correspondence to the plurality of currently displayed images, and
(b22) if it is determined that the analyzed trajectory is the second predetermined trajectory, displaying the currently displayed images.
14. At least one computer readable medium as recited in claim 11, wherein operation (b1) comprises determining whether the analyzed trajectory is a first predetermined trajectory or a second predetermined trajectory, and wherein operation (b2) comprises:
(b21) if it is determined that the analyzed trajectory is the first predetermined trajectory, updating a plurality of currently displayed images by changing a category to which the plurality of currently displayed images belong, and
(b22) if it is determined that the analyzed trajectory is the second predetermined trajectory, updating the plurality of currently displayed images by maintaining the category to which the plurality of currently displayed images belong.
15. At least one computer readable medium as recited in claim 11, wherein operation (b2) comprises displaying the plurality of images corresponding to the sensed locations forming the analyzed trajectory on the plurality of buttons.
16. At least one computer readable medium as recited in claim 11, wherein the plurality of buttons magnify an image selected from among the plurality of displayed images and display the magnified image.
17. At least one computer readable medium as recited in claim 11, wherein the device is one of mobile devices including a cellular phone and a personal digital assistant.
18. The method of claim 1, wherein the device is one of mobile devices including a cellular phone and a personal digital assistant.
19. The device of claim 7, wherein the device is one of mobile devices including a cellular phone and a personal digital assistant.
20. The device of claim 7, wherein the sensor comprises a plurality of touch sensors.
21. The device of claim 7, wherein the sensor comprises a single touch sensor.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A hydrodynamic bearing unit comprising a shaft member having a shaft portion and a flange portion, a bearing member arranged on an outer circumference of the shaft member, and a radial bearing portion and a thrust bearing portion respectively comprising bearing surfaces with grooves for generating hydrodynamic pressure and bearing clearances facing the bearing surfaces, and supporting the shaft member in non-contact state, in the radial direction and the thrust direction respectively, with hydrodynamic pressure generated in the bearing clearances when the shaft member and the bearing member relatively rotate;
wherein the squareness of the both end surfaces of the flange portion with respect to the outer circumference of the shaft portion of the shaft member is 0.001 mm or less respectively, and the flatness of both end surfaces of the flange portion is 0.001 mm or less respectively.
2. The hydrodynamic bearing unit according to claim 1, wherein the squareness of the end surface of the bearing member located opposite to one of the both end surfaces of the flange portion via the thrust bearing clearance with respect to the inner circumference of the bearing member is 0.002 mm or less and the flatness thereof is 0.0015 mm or less.
3. The hydrodynamic bearing unit according to claim 2, wherein the flatness of a surface located opposite to the other end surface of the flange portion via the thrust bearing clearance is 0.002 mm or less.
4. A hydrodynamic bearing unit comprising:
a housing with a bottom portion;
a bearing member fixed to the inner circumference of the housing;
a shaft member having a shaft portion inserted into the inner circumference of the bearing member, and a flange portion;
a radial bearing portion provided between the inner circumference of the bearing member and the outer circumference of the shaft portion of the shaft member for supporting the shaft member in a radial direction in non-contact state with a dynamic pressure generated in a radial bearing clearance; and
a thrust bearing portion respectively provided between each end surface of the flange portion of the shaft member and an end surface of the bearing member or an inner surface of the bottom portion of the housing for supporting the shaft member in a thrust direction in non-contact state with a dynamic pressure generated in thrust bearing clearances;
wherein the parallelism between the inner surface and the outer surface of the housing is 0.005 mm or less.
5. The dynamic pressure bearing unit according to claim 4, wherein the squareness of the both end surfaces of the flange portion with respect to the outer circumference of the shaft portion of the shaft member is respectively 0.001 mm or less, and the flatness of the both end surfaces of the flange portion is 0.001 mm or less.
6. The hydrodynamic bearing unit according to claim 4, wherein the squareness of the end surface of the bearing member located opposite to one of the both end surfaces of the flange portion via the thrust bearing clearance with respect to the inner circumference of the bearing member is 0.002 mm or less, and the flatness thereof is 0.0015 mm or less.
7. The hydrodynamic bearing unit according to claim 5, wherein the squareness of the end surface of the bearing member located opposite to one of the both end surfaces of the flange portion via the thrust bearing clearance with respect to the inner circumference of the bearing member is 0.002 mm or less, and the flatness thereof is 0.0015 mm or less.
8. The hydrodynamic bearing unit according to any of claims 4 through 7, wherein the flatness of the inner surface of the bottom portion of the housing is 0.002 mm or less.
9. A hydrodynamic bearing unit comprising:
a housing with a bottom;
a bearing member fixed to an inner circumference of said housing;
a shaft member having a shaft portion inserted into the inner circumferential surface of said bearing member and a thrust plate provided on said shaft portion;
a radial bearing portion provided between the inner circumferential surface of said bearing member and an outer circumferential surface of the shaft portion of said shaft member for supporting said shaft portion in a radial direction in non-contact state with a dynamic pressure action of fluid generated in a radial bearing clearance; and
a thrust bearing portion respectively provided between each end surface of said thrust plate of the shaft member and the lower end surface of said bearing member or the bottom surface of said housing for supporting said thrust plate in a thrust direction in non-contact state with a dynamic pressure action of fluid generated in a thrust bearing clearance;
wherein the surface hardness of the outer circumferential surface of said shaft portion is larger than that of the inner circumferential surface of said bearing member,
the surface hardness of the both end surfaces of said thrust plate is larger than that of the lower end surface of said bearing member and the bottom surface of said housing,
the surface roughness of the outer circumferential surface of said shaft portion is smaller than that of the inner circumferential surface of said bearing member,
the surface roughness of the both end surfaces of said thrust plate is smaller than that of the lower end surface of said bearing member and the bottom surface of said housing, and
said outer circumferential surface of said shaft portion has a surface characteristic on which fine projections constituting the surface roughness is smoothed.
10. The hydrodynamic bearing unit according to claim 9, wherein the mean square inclination angle q of the outer circumferential surface of said shaft portion is 2.0 or less.
11. The hydrodynamic bearing unit according to claim 9, wherein the both end surfaces of said thrust plate has a surface characteristic on which fine projections constituting the surface roughness is smoothed.
12. The hydrodynamic bearing unit according to claim 10, wherein the both end surfaces of said thrust plate has a surface characteristic on which fine projections constituting the surface roughness is smoothed.
13. The hydrodynamic pressure bearing unit according to claim 11, wherein the mean square inclination angle q of the both end surfaces of said thrust plate is 2.0 or less.
14. The hydrodynamic pressure bearing unit according to claim 12, wherein the mean square inclination angle q of the both end surfaces of said thrust plate is 2.0 or less.
15. The hydrodynamic bearing unit according to any of claims 9 through 14, wherein the arithmetic average deviation Ra of the outer circumferential surface of said shaft portion is 0.04 m or less.
16. The hydrodynamic bearing unit according to any of claims 9 through 14, wherein the arithmetic average deviation Ra of the both end surfaces of said thrust plate is 0.04 m or less.
17. The hydrodynamic bearing unit according to claim 15, wherein the arithmetic average deviation Ra of the both end surfaces of said thrust plate is 0.04 m or less.